Brazil currently has one of the fastest-growing severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) epidemics in the world. Because of limited available data …

Key questions in COVID-19 are the duration and determinants of infectious virus shedding.
Here, we report that infectious virus shedding is detected by virus cultures in 23 of the 129 …

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) alpha
variant (B. 1.1. 7) is associated with higher transmissibility than wild-type virus, becoming the …

Severe acute respiratory syndrome coronavirus 2 viral load in the upper respiratory tract
peaks around symptom onset and infectious virus persists for 10 days in mild-to-moderate …

The world faces an unprecedented SARS-CoV2 pandemic where many critical factors still
remain unknown. The case fatality rates (CFR) reported in the context of the SARS-CoV-2 …

Early detection of SARS-CoV-2 infection is critical to reduce asymptomatic and
presymptomatic transmission, curb the spread of variants, and maximize treatment efficacy …

Since the beginning of the COVID-19 pandemic, molecular methods (eg, real-time PCR)
have been the primary means of diagnosing the disease. It is now well established that …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread rapidly across
the globe, causing epidemics that range from quickly controlled local outbreaks (such as …

Data on the detailed clinical progression of COVID-19 in conjunction with epidemiological
and virological characteristics are limited. In this case series, we describe the first 12 US …

Background The recent emergence of new SARS CoV-2 variants (variants of concern, VOC)
that spread rapidly and may lead to immune escape has emphasized the urgent need to …